Framing instrument



June 18, 1929. c. w. LINTNER FRAMING INSTRUMENT Filed Sept, 13, 1926 WmM Wannunnunnunnnuuununnuununuunuununnunuunnnuununnnnunuuuunuuuunuununnunnnnnnnunnuununnuuuumu Zv Patented June 18, 1929.

UNITED ST T S CHARLES w. LINTNER, or KANsAsoI'rY, ,MISSOURI, AssI'GNoRononn-irnmrro,

HARRY s'rE'rLnn; on

FRAMING INSTRUMENT.

A AppIication filed September My invention relates to framinginstruments whereby a carpenter or other mechanic can readily ascertainthe lengths and bevels of all kinds of rafters, hips, groins, braces,

brackets, purlines, hoppers, stairs, and the bevels and cuts of polygonmiter-s, without resorting to intricate mathematical calculations.

The instrument is of relatively simple and inexpensive construction, andso arranged that it can be folded into compact form and easily carriedwith a kit of tools.

In order that the invention may be fully understood, reference will nowbe had to the accompanying drawing, in which:

Fig. 1 is a plan view of the instrument showing a blade thereof adjustedat an angle, by dotted lines.

Fig. 2 is an enlarged broken vertical section on line 2-2 of Fig. 1.

Fig. 3 is a cross section on line 3-3 of Fig. 1.

Fig. 4 is a cross section on line 44 of Fig. 1. g

In carrying out the invention, I employ a primary beam 2 to which amiter blade 4 is pivotally connected at one end by suitable means suchas a set screw 6 which is equipped with washers 8, one of which bearsagainst the beam 2 and the other against the blade 4 to clamp said beamand the blade firmly together when the set screw 6 istightened.

1O designates a secondary beam arranged at an angle of ninety degrees tothe primary beam 2.

12 designates a holder for holding the secondary beam 10 at an angle ofninety de--,

grees to the primary beam 2. The holder 12 comprises legs 14- and 16arranged at right angles to each other,and a miter member 18' united atits ends with the outer ends of the legs 14 and 16. The leg 14 has alongitudinal passage 20 in which the shank 22 of the secondary beam 10is slidably mounted and removably secured by a set screw 24 threadedinto said leg 14.

The leg 16 of the holder 12 is provided with a longitudinal slideway 26to receive one of.

. the longitudinal margins of the primary beam 2, said margin beingprovided with a flange 28 so that the beam 2 cannot be removed, exceptby sliding off the end of the slideway 26. A set screw 30 is threadedinto the slideway 13, 1926. Serial No. 135,158.

26 for firmly securing the beam 2 and the holder 12 in any of theiradjusted positions. As shown by Fig. l, the beams 2 and 10 and the blade4 are provided on their faces with graduated marks representing inchesand. fractions thereof, so that in the use of the instrument certainmarks can be brought into a certain correlation with apiece of lumber tobe out. As shown by Figs. 1, 2 and 4 one side of the slideway 26terminates just above the flange 28 in order to expose the graduations0n the primary beam2.

The following is a simple example in the use ofthe instrument. If it isdesired to obtain the length of a rafter for a roof to be of a Athirty-two foot span'with a perpendicular height of sixteen feet atthecenter, the holder 12 is shifted longitudinally upon theprimary beam2 to bring the inner edge of the secondary beam 10 into line with thegraduation 16 upon said primary beam 2. The miter blade 4 is thenadjusted upwardly until its inner margin intersects the graduation mark16 on the secondary beam 10. I The space on the inner margin of themiter blade 4 between the axis of the screw 6 and where it intersectsthe inner margin of the secondary beam 10 will represent the length ofthe rafter. After the instrument has thus been adjusted to determine thelength of the rafter the primary beam 2 will give the bevel for thelower end and the secondary beam. 10 the bevel for the upper end of therafter. Many other examples obvious to those skilled in the art I couldbe given.

When lumber is to be ripped to any certain;

width the secondary beam 10 can be adjusted longitudinally to the properpoint in the leg 14 of the holder 12 to constitute a reliable gagewhereby the lumber can be accurately ripped. A r

The Initermember 18 of the holder 12 reinforces the legs 14 and 16,protects the set screws 24 and 30, and affords a convenient handle forholding the tool. It may also be used without removing the primary andsecondary beams from the holder, as a guide when marking lines ontimbers to be out on an angle,

While I have shown and described the preferred construction, combinationand arrangement of parts constituting the instru- In combination, aprimary beam suitably graduated and provided along one margm With alongitudinal flange, a graduated blade pivotally connected to one end ofsaid primary beam, a graduated secondary beam, and a holder consistingof a leg having a longitudinal passage enclosed on four sides forthereceptionof said secondary beam, a second leg extending at rightangles from the first-mentioned leg and having a longitudinal slidewayfor the primary beam, one side of said slideway engaging over andterminatingjust above the flange of the primary beam in order to displaythe graduations upon the latter, means threadedfin the legsfor securingthe respective beamsat any point of their adjustment, and a'miter membersecured to said legs.

In testimony whereof I aflix my signature.

CHARLES W. LINTNER.

